Features: High Quality --- Damaged nut and bolt extractors made of high strength chrome vanadium alloy steel with black oxide finish to resist corrosion, providing superior strength for better tensioning and durability. High Performance --- The spiral flute cutting edge enhanced profile for a secure connection, offers a reverse grip for maximum power. 2 Way Operation --- The suction socket has two ways of driving, a 3/8 square from the center and a hex on the outside. Hex flats used in conjunction with sockets, pliers, open-end wrench, and locking pliers, vise clamp, etc., while 3/8 inch square drive can accommodate regular 3/8 or extension ratchet. EQUIPPED --- Total 10 metric standard sizes sockets including 9/10/11/12/13/14/15/16/17/19mm. Extremely effective for removing rust, stubborn nuts, and even rounded or stripped studs especially oil drain bolts. An extension included to remove the damaged fastener from the socket. Practical Select --- Each socket engraved #1 #10 on for better visibility. A must-have tool for oil drain plug, oil pan head bolts, exhaust manifold nuts, automotive, vehicle and engine, etc. Specifications: Material: Chrome Vanadium Alloy Steel Remove No.: No. 1/2/3/4/5/6/7/8/9/10 Inner Size(Fit for removing Hex Size): 9/10/11/12/13/14/15/16/17/19mm Outside Hex Size: 16/16/19/19/19/22/22/25/25/27mm Item Weight: 240g / 8.5oz Package Weight: 246g / 8.7oz Package Size: 15 * 10 * 3cm / 5.9 * 3.9 * 1.2in Package List: 10 * Nut Extractor 1 * Wrench